Help your dog kick their allergies to the curb with the 4health Allergy with Immune Support Supplement for Dogs. This pet allergy supplement can be taken by dogs 12 weeks of age or older. It's made with probiotics for immune and intestinal health support, as well as colostrum to promote healthy immune system function. Packaged as tasty, easy-to-eat soft chews. They're ideal for pet of all life stages, including Extra-Small, Small, Medium, Large and Extra-Large breeds.